--- attr_reader(name,  ... )

    ° name ɤ߽Ф᥽åɤޤ
    name  Symbol ʸǻꤷޤ
    ͤϾ nil Ǥ

    Υ᥽åɤ᥽åɤϰʲ̤Ǥ

      def name
        @name
      end

